Global Patent Index - EP 0352748 A3

EP 0352748 A3 19910508 - MAGNETO-OPTICAL RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME

Title (en)

MAGNETO-OPTICAL RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME

Publication

EP 0352748 A3 19910508 (EN)

Application

EP 89113711 A 19890725

Priority

JP 18801788 A 19880729

Abstract (en)

[origin: EP0352748A2] A magneto-optical recording medium comprising a transparent substrate (1), and a dielectric film (2) and a recording film (3) laminated on the transparent substrate (1) in that order, the dielectric film being composed of a silicon nitride film containing 1 to 12 at% of at least one metal element selected from the group consisting of Co, Fe, Ni, Mo, Zn, Cr, Mn, Cu, Pd, Pt, Ag, Au and V can prevent a laminated film from peeling off, and hold good recording and reproducing characteristics for a long time. This magneto-optical recording medium is easily manufactured by forming the dielectric film (2) on the transparent substrate (1) and further forming the recording film (3) on the dielectric film (2), wherein the dielectric film (2) is formed by a reactive sputtering method carried out at a pressure of 2.0 to 3.0 Pa in an atmosphere of a mixed gas of argon and nitrogen containing 10 to 30 vol% of nitrogen gas.

IPC 1-7

G11B 11/10

IPC 8 full level

G11B 11/10 (2006.01); G11B 11/105 (2006.01)

CPC (source: EP)

G11B 11/10582 (2013.01)

Citation (search report)

  • [XD] US 4680742 A 19870714 - YAMADA TAKASHI [JP], et al
  • [A] PATENT ABSTRACTS OF JAPAN vol. 11, no. 340 (P-634)(2787) 7 November 1987, & JP-A-62 121945 (MITSUBISHI ELECTRIC CORP) 3 June 1987,
  • [A] PATENT ABSTRACTS OF JAPAN vol. 11, no. 391 (P-649)(2838) 22 December 1987, & JP-A-61 157347 (KYOCERA CORP) 13 July 1987,

Designated contracting state (EPC)

DE FR NL

DOCDB simple family (publication)

EP 0352748 A2 19900131; EP 0352748 A3 19910508; EP 0352748 B1 19931110; DE 68910601 D1 19931216; DE 68910601 T2 19940303; JP 2637777 B2 19970806; JP H0240147 A 19900208

DOCDB simple family (application)

EP 89113711 A 19890725; DE 68910601 T 19890725; JP 18801788 A 19880729